Did your child have history of frequent cough
and colds?You also didnot mention whether your child had any history of wheeze or not. Your doctor must found ronchi on auscultation of chest . Butalin contains albuterol which is a short acting bronchodilator
which will help in releiving bronchospasm
.But if your child has asthma, it will not help in long term. Your son need to inhale budecort MDI through face mask twice daily. Butalin may lead to tremor, tachycardia(increased heart rate
, hypokalemia( decreased potassium),abnormal glucose tolerance. But occurence of this side effects are not so common. It is more important from you side worry about the symptoms rather than to worry abot the side effects. Please consult a pulmonologist
or paediatrician for correct diagnosis. It is difficult to give a definite management without seeing your child . Hope, I answered your queries.